trans-4-Carboxymethylenebut-2-en-4-olide structure

trans-4-Carboxymethylenebut-2-en-4-olide

(2Z)-2-(5-oxofuran-2-ylidene)acetic acid

Also Known As: Dienelactone|cis-dienelactone|trans-4-Carboxymethylenebut-2-en-4-olide|4-carboxymethylenebut-2-en-4-olide|(2Z)-2-(5-oxofuran-2-ylidene)acetic acid|cis-4-carboxymethylenebut-2-en-4-olide|(Z)-5-Oxodelta(2(5H),alpha)-furanacetic acid|(2Z)-5-Oxofuran-2(5H)-ylideneacetic acid|(2Z)-(5-oxofuran-2(5H)-ylidene)acetic acid|(Z)-2-(5-Oxofuran-2(5H)-ylidene)acetic acid|2-[(2Z)-5-Oxofuran-2(5H)-ylidene]acetic acid|(2Z)-5-Oxo-2,5-dihydrofuran-2-ylideneacetic acid|(4Z)-4-Hydroxy-2,4-hexadienedioic acid 1,4-lactone|delta(2(5H),alpha)-Furanacetic acid, 5-oxo-, (Z)-|[[(2Z)-2,5-Dihydro-5-oxofuran]-2-ylidene]acetic acid|2-[(2Z)-5-oxo-2,5-dihydrofuran-2-ylidene]acetic acid

CAS: 22752-92-7
Molecular Formula C6H4O4
Molecular Weight 140.01096 g/mol
LogP 0.0679
Topological Polar Surface Area 63.6 Ų
Hydrogen Bond Donors 1
Hydrogen Bond Acceptors 3
Rotatable Bonds 1
Exact Mass 140.01096
Monoisotopic Mass 140.01096
Heavy Atoms 10
Complexity 236.13237

Chemical Identifiers

CAS Number 22752-92-7
SMILES C\1=CC(=O)O/C1=C\C(=O)O

Product Overview

trans-4-Carboxymethylenebut-2-en-4-olide (CAS 22752-92-7), with molecular formula C6H4O4 and molecular weight 140.01096 g/mol. IUPAC: (2Z)-2-(5-oxofuran-2-ylidene)acetic acid.

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Safety Data Sheet (MSDS / SDS) View the Laboratory Chemical Safety Summary (LCSS) on PubChem — includes GHS classifications, hazard statements, first aid measures, and handling precautions.
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